Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ce8be274385595…

MALICIOUS

PDF

42.8 KB Created: 2020-09-11 02:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9e9a89d240e2ab55f31360f7753e7efe SHA-1: d68a9c43d7c3112909b19b495f556de421f8dd98 SHA-256: 90ce8be2743855954c0d05356367068e705c316604fbc72b947275333c5b5c7e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely used to funnel victims to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same lure text and URLs as found in the heuristics, indicating a deliberate attempt to trick the user into clicking the malicious link. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/wix?keyword=8th+grade+inequalities+word+problems+and+answers In PDF document text
    • http://files.toddjohnsonart.com/uploads/1/3/0/7/130776149/banekarejuw.pdfIn PDF document text
    • http://xuxumu.boyneriverjems.com/uploads/1/3/1/3/131381612/tifini-fajabubu.pdfIn PDF document text
    • http://pajener.thaischool.org/uploads/1/3/1/6/131636825/163995.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/ec0c41_85c823b84f5e41e4a9f0c1184ba5ad82.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e5db3_1dd0801f20a24258bade07a9b574ab49.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1b7c00_ca1655fd99bd4184ad1d28e5765a7911.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3bca44_6e8807d617fd402fb9aa2c4ec8dc211a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7499261b048c48148410d7ed21b63506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2825/7685/files/vomis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5024/6054/files/buxapagitivewalinefu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c5d40f_59dac059cbaa4a379c0afb2690dd8b4a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3b47cb_ebfe5d7876764e2d845064a38728a2bd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1d3654_840a60bf9a31404d92d588bb3e233845.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dcbeda_f2f5030c726e41e7a7a8ae2561411646.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5a1791_268134f6f0c6417da4796dccb1a1acee.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000664e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664E 5832 bytes
SHA-256: 9082701f42efb268450da24addecc722f1b0e63a0d8b9981b8593a0dc27aca98
font_01_sfnt_off000079f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F9 10552 bytes
SHA-256: 6bd7568a2b2006d3e28496ddc8a258e176654bdbb8854a519d54ec1b069e154f

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